Casey — A Revision of the American Paederini. 189 



the preceding species; prothorax as long as wide, the sides feebly 

 arcuate, just visibly convergent from apex to base, the angles moder- 

 ately rounded; elytra relatively small, as long as wide, about equal in 

 width and length to the prothorax, the sides very slightly diverging 

 from the base. Length 2.8 mm.; width 0.6 mm. Alabama (Eufaula). 



alabamaen. sp. 



The sexual characters are simple, the male, as in Caloder- 

 ma, having a small rounded or more or less angulate sinus at 

 the tip of the sixth segment, becoming decidedly larger and 

 triangular in alabamae, and the anterior tarsi are more 

 strongly dilated in that sex. Some of the Massachusetts 

 specimens, described as thoracicum in the table, were sent to 

 me by M. Salle, under the name obsoletum Nord., and I have 

 also taken it myself at Taunton, Mass. It differs from the 

 true obsoletum, as represented by some Dalmatian examples 

 sent me by Mr. Eeitter, in its smaller size, relatively much 

 larger prothorax and smaller elytra and in the deeper sinus 

 of the sixth ventral of the male. The western capitulum re- 

 sembles obsoletum much more closely in size and form, but 

 has a deeper male sinus and relatively larger prothorax. The 

 true obsoletum does not therefore occur in America, and its 

 insertion in our catalogue is a result of careless and super- 

 ficial comparative study, as has been the case in many other 

 instances. Most of our faunistic catalogues are diminished 

 considerably in value from this cause. 



Lena Csy. 



Although evidently allied to Pseudomedon by the structure 

 of the labrum, gular sutures and hind tarsi, this genus de- 

 parts widely in general facies, sculpture, in antennal structure 

 and in its undilated anterior tarsi. The labrum is completely 

 devoid of any trace of teeth but has a well developed median 

 notch ; the gular sutures are moderately separated at the 

 front of the under surface of the head but thence gradually 

 diverge widely to the base. The antennae are somewhat as 

 in Medonella, being very short, with the third joint shorter 

 and narrower than the second, the shaft gradually becoming 

 notably thicker or clavate toward tip. The posterior tarsi are 



